1N/A/*-
1N/A * See the file LICENSE for redistribution information.
1N/A *
1N/A * Copyright (c) 1996, 1997
1N/A * Sleepycat Software. All rights reserved.
1N/A */
1N/A/*
1N/A * Copyright (c) 1998 by Sun Microsystems, Inc.
1N/A * All rights reserved.
1N/A */
1N/A
1N/A#include "config.h"
1N/A
1N/A#pragma ident "%Z%%M% %I% %E% SMI"
1N/A
1N/A#ifndef lint
1N/Astatic const char sccsid[] = "@(#)hash_conv.c 10.4 (Sleepycat) 9/15/97";
1N/Astatic const char sccsi2[] = "%W% (Sun) %G%";
1N/A#endif /* not lint */
1N/A
1N/A#ifndef NO_SYSTEM_INCLUDES
1N/A#include <sys/types.h>
1N/A#endif
1N/A
1N/A#include "db_int.h"
1N/A#include "db_page.h"
1N/A#include "db_swap.h"
1N/A#include "hash.h"
1N/A
1N/A/*
1N/A * __ham_pgin --
1N/A * Convert host-specific page layout from the host-independent format
1N/A * stored on disk.
1N/A *
1N/A * PUBLIC: int __ham_pgin __P((db_pgno_t, void *, DBT *));
1N/A */
1N/Aint
1N/A__ham_pgin(pg, pp, cookie)
1N/A db_pgno_t pg;
1N/A void *pp;
1N/A DBT *cookie;
1N/A{
1N/A DB_PGINFO *pginfo;
1N/A u_int32_t tpgno;
1N/A
1N/A pginfo = (DB_PGINFO *)cookie->data;
1N/A tpgno = PGNO((PAGE *)pp);
1N/A if (pginfo->needswap)
1N/A M_32_SWAP(tpgno);
1N/A
1N/A if (pg != PGNO_METADATA && pg != tpgno) {
1N/A P_INIT(pp, pginfo->db_pagesize,
1N/A pg, PGNO_INVALID, PGNO_INVALID, 0, P_HASH);
1N/A return (0);
1N/A }
1N/A
1N/A if (!pginfo->needswap)
1N/A return (0);
1N/A return (pg == PGNO_METADATA ?
1N/A __ham_mswap(pp) : __db_pgin(pg, pginfo->db_pagesize, pp));
1N/A}
1N/A
1N/A/*
1N/A * __ham_pgout --
1N/A * Convert host-specific page layout to the host-independent format
1N/A * stored on disk.
1N/A *
1N/A * PUBLIC: int __ham_pgout __P((db_pgno_t, void *, DBT *));
1N/A */
1N/Aint
1N/A__ham_pgout(pg, pp, cookie)
1N/A db_pgno_t pg;
1N/A void *pp;
1N/A DBT *cookie;
1N/A{
1N/A DB_PGINFO *pginfo;
1N/A
1N/A pginfo = (DB_PGINFO *)cookie->data;
1N/A if (!pginfo->needswap)
1N/A return (0);
1N/A return (pg == PGNO_METADATA ?
1N/A __ham_mswap(pp) : __db_pgout(pg, pginfo->db_pagesize, pp));
1N/A}
1N/A
1N/A/*
1N/A * __ham_mswap --
1N/A * Swap the bytes on the hash metadata page.
1N/A *
1N/A * PUBLIC: int __ham_mswap __P((void *));
1N/A */
1N/Aint
1N/A__ham_mswap(pg)
1N/A void *pg;
1N/A{
1N/A u_int8_t *p;
1N/A int i;
1N/A
1N/A p = (u_int8_t *)pg;
1N/A SWAP32(p); /* lsn part 1 */
1N/A SWAP32(p); /* lsn part 2 */
1N/A SWAP32(p); /* pgno */
1N/A SWAP32(p); /* magic */
1N/A SWAP32(p); /* version */
1N/A SWAP32(p); /* pagesize */
1N/A SWAP32(p); /* ovfl_point */
1N/A SWAP32(p); /* last_freed */
1N/A SWAP32(p); /* max_bucket */
1N/A SWAP32(p); /* high_mask */
1N/A SWAP32(p); /* low_mask */
1N/A SWAP32(p); /* ffactor */
1N/A SWAP32(p); /* nelem */
1N/A SWAP32(p); /* h_charkey */
1N/A SWAP32(p); /* flags */
1N/A for (i = 0; i < NCACHED; ++i)
1N/A SWAP32(p); /* spares */
1N/A return (0);
1N/A}